Slip-on band for v-belts



J. L. SPARLING SLIP-ON BAND FOR VBELTS Flled June 2 1933 .Zwezao; KJL Spa/la May 5, 1936.

I Patented May. 5, 1936 UNITED STATES 2,039,461 sun-on BAND Foa v-nmxrs Jacob Lawcrcnce Sparling, Bay City, Mich, as-

- :Lgnor of one-half to Edwin W. Sims, Chicago,

Application 1..... 2. 193:, Serial No. 073,954 i Claim. (01. 74-230.),

The present invention relates to an attachment for flat or crown faced pulleys, and more in particular to a novel construction of slip-on band adapted to be readily mounted upon the face of such a pulley for receiving or driving a V belt.

Among the objects of the present invention is to provide a band or lagging adapted to be readily slipped-on a flat or crown faced pulley for receiving a V belt. In prior constructions, when- 10 ever itwas desired to use a V belt, it was; either necessary to, discard the flat or crown faced pulleys or flywheels and substitute therefor V- shaped pulleys or flywheels, or to cut V-shaped grooves therein. In either case, this procedure 5 is extremely expensive since both the driving and driven pulleys would have to be provided with such grooves.

A further object of the invention is to provide a slip-on band for receiving a; V belt and adapted 20 to be attached to any commercial or standard size pulley or flywheel by any one without previous experience.

A still further object is to provide a readily attachable band for V belts constructed of 112b- 25 her, leather or the like, and which may be manufactured cheaply and stocked for various size pulleys whereby aflat or crown faced pulley may be quickly transformed at small expense to receive a V belt.-

Another object of 'the invention is the provision of a novel band or lagging having a V- shaped groove for receiving a V belt, the band or lagging being formed of resilient or flexible material such as rubber, leather or the like, having the property of great durability, preventing or reducing belt slippage and increasing the power factor.

Further objects are to provide a construction of maximum simplicity, cillciency, economy and ease of assembly, and such further objects, advantages and capabilities as will later more fully appear and as are inherently possessed thereby.

The invention further resides in the combination, construction ,and arrangements of parts illustrated in the accompany nz. drawing, and while there is shown therein a preferred embodiment, it is to be understood that the same is susceptible of modification and change, and comprehends other arrangements and details, without departing from the spirit of the invention.

In the drawing:

Fig. 1 is a view in perspective of the novel slip-on band;

Fig. 2 is a view in vertical cross section therethrough;

Fig. 3 is a view in side elevation of a pulley or flywheel, and of a slip-on band or lag in position to be slipped thereom'.

Fig. 41s a view in vertical cross section through the construction disclosed in Fig. 3, after. the 5 band or lagging has been placed in position;

Fig. 5 is' a fragmentary view in vertical cross section through a slip-on band or lagging provided with a pair of grooves.

Referring more particularly to the disclosure in Figs. 1 to 4 of the drawing, the embodiment selected to illustrate the invention comprises a novel band or lagging constructed of rubber, leather or other flexible or resilient material, and comprising a rim I provided with spaced up- U standing, annular projections or ribs 2 adapted to form therebetween a" groove '3 for receiving'a V belt. When this member is constructed of rubber or the like, it is generally moulded with the ribs or projections formed integral with the rim. If it is constructed of leather or the like, these ribs or projections may be made separate and suitably affixed to the rim in any desired manner whereby to provide a substantially integral construction.

In Fig. 3, the band is shown about to be slipped onto a crown faced pulley or fly wheel 4 mounted on a drive or driven shaft 5. This pulley or flywheel comprises a hub 6 having spokes I, and an outer face 8. Fig. 4 shows the band or lagging in position upon the pulley 4, and although a crown faced pulley is disclosed in both figures, it is to be understood that the invention is equally adapted for use on either apulley of this type or one having a flat face. In the smaller size piilleys, it-may not be necessary to attach or aflix the band or lagging to the pulley or flywheel, although this may be readily done as by shellacking the surface of the pulley, and/or the inner surface of the band, and then slipping the band into position.

In Fig. 5 there is disclosed a band or lagging adapted to receive a pair of V belts. In this construction, the rim 9 is provided with outer, annular projections or ribs/ll, and a central projection or rib ll adapted to form therebetween a pair oi grooves for receiving the V belts. Although but two grooves have been disclosed, it will be readily apparent that the band may be made with any number or contour of grooves as the. occasion may require. -In the larger size pulleys or fly wheels it maybe desirable to employ a metal reenforcing to add rigidity or sta- ,bility to the construction. This may molded u directly into the band or otherwise inserted therein.

The present invention provides a construction in which the ordinary pulley or fly wheel may be transformed quickly and at slight expense, into a construction for receiving a V belt. Since both the driving and driven pulley are so transformed, even though the diameters thereof are increased, they are increased in proportion and the speed will remain the same.

Although the construction is disclosed in the form of a band, it is to be understood that it may be made of a continuous length, and cut and fitted to the pulley with its ends riveted or otherwise connected or secured. In making the band of rubber or the like, the band may be stretched over the pulley and thereby provide a tight fit without any additional securing means.

In employing the prior type of pulleys or fly wheels with the fiat belt,'there is always danger of the belt flying off and the motor running idly and speeding up. This frequently causes considerable damage to the motor in addition to the r loss 0i energy and cost of current consumption.

This disadvantage is entirely eliminated by the use of the present construction since the fiat or crown faced pulleys may be readily transformed at very little expense to receive and drive or be invention is due to the inherent resilient flexibility of the material used in its construction, there being a, slight tendency of the ribs 2 to flex while engaged by a moving belt. This flexing not only tends to maintain a uniform frictional engagement of the ribs against the sides of .the belt and thereby results in improved traction, but will also increase the frictional engagement between the pulley face and the band by reason of the slightdistortion of the ribs, which creates a definite inward pressure upon the band, thereby bringing the engaging surfaces of the band and the pulley face into closer engagement with each other.

Having thus disclosed the invention, I claim: An attaching band for converting a standard stock fiat or crown-faced pulley into one adapted to receive a V-belt, comprising a preformed cylindrical member provided wit'1 axially spaced annular projections on its exterior spaced longitudinally inward from the ends thereof, the inner sides of said annular projections being so relatively inclined as to form a V-groove, said body and said annular projections being constructed of a non-metallic material possessing inherent resilient flexibility, said body being so constructed and arranged as to be slipped onto the face of said pulley and retained thereon by its inherent resilient flexibility, said ribs being of sufficient thickness to resiliently maintain frictional contact with a V-belt while in engagement therewith.

' JACOB Le RENCE SPARLING. 

